Why does it matter so much to atheists that God doesn't exist?

Because these are not any gods rules we are talking about.

IT does not matter, mainly because it does not exist.

Notice that I said their rules, not any gods rules.

What are some funny stories of people calling 911 for non-emergencies?

These are man made rules - made thousands of years ago for the use of the humans who lived thousands of years ago.

And how do you deny hundreds of years of advancement in all fields of science?

Those rules that you are trying to reinstate are rules made by men who didn't know anything about the earth, nor anything about all of the other inhabitants of it. How can you not see that?

Why is there a "double standard" applied to sex between a dog and a human? Why is it that to many who are at least mildly okay with bestiality, a WOMAN having sex with a male dog is fine, but a guy with a female dog is not?

My problem is that people who try to shove their rules down everyone's throats - including by physical force - DO EXIST .

And then use and ENJOY these fantastic scientific advancements every single day of your life?

I do not personally care if you believe in a god or not.

What measures do celebrities take to protect their images from being used for commercial purposes without permission? How much does this typically cost them?

A belief in a god is not the problem.

THE BIBLE IS THE PROBLEM!

I am speaking to the US Bible thumpers here, of course ~ many of whom are flat-earthers who deny evolution and see scientists as evil people who are constantly trying, and succeeding, in disproving their beliefs one by one.

What is the most peculiar thing about the human brain?

The people of the modern world have evolved past all of that nonsense.